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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** ACM CDC Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_cdc_acm.h"
#include "ux_host_stack.h"
#if defined(UX_HOST_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_cdc_acm_transmission_callback PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the callback from the USBX transfer functions, */
/* it is called when a full or partial transfer has been done for a */
/* bulk in transfer. It calls back the application. */
/* */
/* It's for standalone mode. */
/* */
/* INPUT */
/* */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_host_stack_transfer_run Process transfer request */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
VOID _ux_host_class_cdc_acm_transmission_callback(UX_TRANSFER *transfer_request)
{
UX_HOST_CLASS_CDC_ACM *cdc_acm;
ULONG request_length;
VOID (*write_callback)(struct UX_HOST_CLASS_CDC_ACM_STRUCT *, UINT, ULONG);
/* Get the class instance for this transfer request. */
cdc_acm = (UX_HOST_CLASS_CDC_ACM *) transfer_request -> ux_transfer_request_class_instance;
/* Check the state of the transfer. If there is an error, we do not proceed with this report. */
if (transfer_request -> ux_transfer_request_completion_code == UX_SUCCESS)
{
/* Update write information. */
cdc_acm -> ux_host_class_cdc_acm_write_count +=
transfer_request -> ux_transfer_request_actual_length;
/* Check if there is remaining. */
request_length = cdc_acm -> ux_host_class_cdc_acm_write_length -
cdc_acm -> ux_host_class_cdc_acm_write_count;
if (request_length > 0)
{
/* Program the maximum authorized length for this transfer_request. */
if (request_length > transfer_request -> ux_transfer_request_maximum_length)
request_length = transfer_request -> ux_transfer_request_maximum_length;
/* Update buffer pointer and request length. */
transfer_request -> ux_transfer_request_data_pointer +=
transfer_request -> ux_transfer_request_actual_length;
transfer_request -> ux_transfer_request_requested_length = request_length;
UX_TRANSFER_STATE_RESET(transfer_request);
/* Arm another transfer. */
_ux_host_stack_transfer_run(transfer_request);
/* There is no status to be reported back to the stack. */
return;
}
}
/* There is error, or total things done, set state to idle. */
cdc_acm -> ux_host_class_cdc_acm_write_state = UX_STATE_RESET;
/* Clear callback for blocking mode. */
write_callback = cdc_acm -> ux_host_class_cdc_acm_write_callback;
cdc_acm -> ux_host_class_cdc_acm_write_callback = UX_NULL;
/* We need to report this transfer to the application. */
if (write_callback)
{
write_callback(cdc_acm,
transfer_request -> ux_transfer_request_completion_code,
cdc_acm -> ux_host_class_cdc_acm_write_count);
}
/* There is no status to be reported back to the stack. */
return;
}
#endif
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